Improvement in bib-cocks



JOSEPH H. DAVIS, OF ALLEGHENY OITY, PENNSYLVANIA.

Letters Patent No. 99,649, dated February 8, 1870.

The Schedule referred to in these Letters Patent and making part of the same,

T o all whom it may concernl Be it known that I, JOSEPH H. DAVIS, of the city, and county ofAlleghcny, and State of Pennsylvania, have invented a certain new and useful article of mannfacture, viz, Malleable .Gast-Iron and Steel Bib- Oocks and I do hereby declare that the following is a full, cear, and exact description thereof, reference being had to the accompanying drawings, and tO the letters of reference marked thereon.

The nature of my invention consists in making a new article of manufacture, viz, bib-cocks, construeted of east-iron, and subsequently annealed.

To enable others skilled in the art to make and use my imention, I will proceed to describe its construction.

In the accompanying drawings, which form part of my specification- I Figure l is a vertical and longitudinal section of Vmy improvement in bib-cocks.

Figure 2 is a side elevation of the same.

The body of the bib-cock, consistingof the chambers A, B, and B', is made in one piece, and is cast in the usual way. The bores of the chambers A, B, and B' are all ofthe same diameter.

lhc inlet g and Outlet h, may be of such diameter that they will receive pipes, the bore of which may be equal to the opening (l, for the valve D.

"I he cap or mounting f of the valve A, may be made of malleable iron, steel, or brass, and the valve D, and

` its stem, may also be made of the same metal.

The castings for the several parts of the valve should be made of that qualityof pig-iron which is suitable for being converted into malleable cast-iron,7 by any ofthe known methods, which malleable castings may afterward be subjected to the process 'of cementation, and thereby be converted into steel.- The castings, after being properly converted into malleable cast-iron, are then carefully cleaned, by placing them in a rattling-mill or scouring-null, suclras are used by manufacturers of malleable castings. After being properly cleaned, they are fitted up so as to. finish and complete the valve in all its parts, as shown in the accompanying drawings. N ow, if `it is desirable to convert the entire valve, or any of its parts, into steel, the different parts are separated, and placed in suitable converting-chests or chambers., and subjectedl to the process of cernentation, which process is well understood by the skilled metalargist.

The advantage of constructing bib-cocks of malleable cast-iron, consists- First, in making a stronger and more durable bibcock than can be made of ordinary cast-iron 'or brass,

t for the tensile strength of malleable cast-iron is greater than either cast-iron or brass.

Second, a bib-cock, constructed of malleable castiron or steel, may be made much lighter than when made of ordinary cast-iron or brass, thereby saving stock, and cost of transportation. l

Third, a bib-cock constructed of malleable c astiron or steel, as hereinbefore described, can be made cheaper than when niadc of brass, and are equally suscept-able ofa fine finish, and at less cost for finishing.

Fourth, bib-cocks of every kind, form, and size, may, with advantage, be constructed of malleable cast-iron or steel, as herein described, which is very difficult to accomplish with ordinary cast-iron.

Fifth, any one or more of the several parts of the bib-cocks may, withease, facility, and cheapness bev made Of steel, by. constructing it or them in the manner hereinbetbre described.

The skillful mechanic and manufacturer of bibcocks7 will readily see and understand from the foregoing description of my invention, that my improvement will be of great advantage to the consumer and user of bib-cocks.

It will be perceived that the excellence of this bibcock depends upon the use of iron thatl has passed through the process of annealing, and that for this purpose malleable iron and steel are hence equivalents. I therefore do not confine myself to material in either of these stages of manufacture; but

Vhat I claim, as a new article of nianutacture, is A bib-cock mide Of cast-iron, and subsequently annealed, all substantially as herein described. JOS. H. DAVIS. WVitnesses:

J AMEsJ JOHNSTON, Jas. G. THOMPSON. 

